Solve unused header warnings reported by clangd

src/libutil/args.hh

@@ -1,7 +1,6 @@
 #pragma once
 ///@file
 
-#include <iostream>
 #include <functional>
 #include <map>
 #include <memory>
@@ -11,6 +10,7 @@
 
 #include "types.hh"
 #include "experimental-features.hh"
+#include "ref.hh"
 
 namespace nix {
 

src/libutil/error.hh

@@ -16,16 +16,12 @@
  */
 
 #include "suggestions.hh"
-#include "ref.hh"
-#include "types.hh"
 #include "fmt.hh"
 
 #include <cstring>
 #include <list>
 #include <memory>
-#include <map>
 #include <optional>
-#include <compare>
 
 #include <sys/types.h>
 #include <sys/stat.h>

src/libutil/file-content-address.hh

@@ -2,8 +2,6 @@
 ///@file
 
 #include "source-accessor.hh"
-#include "fs-sink.hh"
-#include "util.hh"
 
 namespace nix {
 

src/libutil/fs-sink.hh

@@ -1,7 +1,6 @@
 #pragma once
 ///@file
 
-#include "types.hh"
 #include "serialise.hh"
 #include "source-accessor.hh"
 #include "file-system.hh"

src/libutil/logging.hh

@@ -1,7 +1,6 @@
 #pragma once
 ///@file
 
-#include "types.hh"
 #include "error.hh"
 #include "config.hh"
 

src/libutil/ref.hh

@@ -1,9 +1,7 @@
 #pragma once
 ///@file
 
-#include <compare>
 #include <memory>
-#include <exception>
 #include <stdexcept>
 
 namespace nix {

src/libutil/source-accessor.hh

@@ -4,6 +4,7 @@
 
 #include "canon-path.hh"
 #include "hash.hh"
+#include "ref.hh"
 
 namespace nix {
 

src/libutil/terminal.hh

@@ -1,7 +1,8 @@
 #pragma once
 ///@file
 
-#include "types.hh"
+#include <limits>
+#include <string>
 
 namespace nix {
 /**

src/libutil/types.hh

@@ -1,12 +1,10 @@
 #pragma once
 ///@file
 
-#include "ref.hh"
 
 #include <list>
 #include <set>
 #include <string>
-#include <limits>
 #include <map>
 #include <variant>
 #include <vector>